Surname Nithu (Nithu 
) , globally, is a rare cognomen. The family name Nithu is habitual in Qatar, where it is quite a rare surname, Sri Lanka, and United Arab Emirates, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Southern Asia, particularly Sri Lanka, India, and Bangladesh. More prevalently, Nithu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Nithu | Bangladesh, Saudi Arabia, India, Sri Lanka, Qatar |